Regirock

To be able to enter Desert Ruins the player must complete Sealed Chamber's puzzle. Inside there is a door with braille on it, which leads to the room where Regirock is located. In Ruby and Sapphire it reads "Right, right, down, down. Then, use Strength." and to open the door the player must take two steps to the right and two steps down and use Strength. In Emerald it reads "Left, left, down, down. Then, use Rock Smash." and to open the door the player must take two steps to the left and two steps down and use Rock Smash.